JP3237345B2 - Heating furnace heating method - Google Patents

Heating furnace heating method

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Publication number
JP3237345B2
JP3237345B2 JP26444293A JP26444293A JP3237345B2 JP 3237345 B2 JP3237345 B2 JP 3237345B2 JP 26444293 A JP26444293 A JP 26444293A JP 26444293 A JP26444293 A JP 26444293A JP 3237345 B2 JP3237345 B2 JP 3237345B2
Authority
JP
Japan
Prior art keywords
heating
combustion
burner
furnace
exhaust gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP26444293A
Other languages
Japanese (ja)
Other versions
JPH07118753A (en
Inventor
良基 藤井
博明 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
JFE Engineering Corp
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Filing date
Publication date
Application filed by JFE Engineering Corp filed Critical JFE Engineering Corp
Priority to JP26444293A priority Critical patent/JP3237345B2/en
Publication of JPH07118753A publication Critical patent/JPH07118753A/en
Application granted granted Critical
Publication of JP3237345B2 publication Critical patent/JP3237345B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Landscapes

  • Furnace Details (AREA)
  • Air Supply (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Tunnel Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、炉内を複数の燃焼ゾー
ンに区画するとともに、燃料の燃焼と蓄熱体を通しての
排ガス排出を交番で行う１対以上の蓄熱式バーナを各ゾ
ーンの炉壁に対向または隣接して配置した加熱炉の加熱
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a furnace wall having a plurality of regenerative burners which alternately performs combustion of fuel and discharge of exhaust gas through a regenerator while dividing a furnace into a plurality of combustion zones. The present invention relates to a heating method for a heating furnace disposed adjacent to or adjacent to a heating furnace.

【０００２】[0002]

【従来の技術】近年、加熱炉、熱処理炉等工業用炉（以
下総称して加熱炉という）の熱効率を高めるために、炉
内を複数の燃焼ゾーンに区画するとともに、燃料の燃焼
と蓄熱体を通しての排ガス排出を交番で行う１対以上の
蓄熱式バーナを各ゾーンの炉壁に対向または隣接して配
置した加熱炉が使用されるようになっている。2. Description of the Related Art In recent years, in order to increase the thermal efficiency of industrial furnaces such as heating furnaces and heat treatment furnaces (hereinafter collectively referred to as heating furnaces), the furnace is divided into a plurality of combustion zones, and fuel combustion and regenerators are performed. A heating furnace is used in which one or more pairs of regenerative burners, which alternately discharge exhaust gas through the furnace, are arranged facing or adjacent to the furnace wall of each zone.

【０００３】このような加熱炉は、例えば特開平２−１
０００２号公報に開示されている。この加熱炉で被加熱
物を加熱するときには、一対のバーナの対の一方で燃焼
を行うとともに、他方で発生した燃焼排ガスを蓄熱体を
通して排出する。対応する対のバーナの燃焼と排ガス排
出の分担は一定時間毎に入れ代わり、燃焼時には前記蓄
熱体に燃焼用空気を通して、蓄熱体の保有する熱で燃焼
用空気を予熱して使用する。[0003] Such a heating furnace is disclosed in, for example, Japanese Patent Application Laid-Open No. 2-1.
No. 0002. When heating an object to be heated in this heating furnace, one of the pair of burners performs combustion, and the other generates combustion exhaust gas through a regenerator. The combustion of the corresponding pair of burners and the emission of exhaust gas are replaced at regular intervals, and during combustion, the combustion air is passed through the regenerator and the combustion air is preheated and used by the heat held by the regenerator.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上述し
た、特開平２−１０００２号公報に開示された加熱炉で
は、非加熱物は炉床に直接置かれるため、被加熱物の炉
床側表面には火炎及び炉壁からの輻射熱が伝達されず、
加熱中の被加熱物の表裏面で温度差が生じる。加熱過程
で生じた非加熱物内の温度差が、圧延工程での圧延不均
一をもたらす。被加熱物の温度を均一にするには加熱時
間を長くすることが必要となるという問題点がある。However, in the above-described heating furnace disclosed in Japanese Patent Application Laid-Open No. 2-10002, the unheated material is placed directly on the hearth, so that the heated object is placed on the hearth side surface of the heated object. Does not transmit the radiant heat from the flame and the furnace wall,
A temperature difference occurs between the front and back surfaces of the object to be heated during heating. The temperature difference in the unheated material generated in the heating process causes uneven rolling in the rolling process. There is a problem that it is necessary to lengthen the heating time in order to make the temperature of the object to be heated uniform.

【０００５】本発明は従来技術の上記のような問題を解
決するためになされたものであり、被加熱物を短時間で
均一に加熱することのできる加熱方法を提供することを
目的としている。The present invention has been made to solve the above-mentioned problems of the prior art, and has as its object to provide a heating method capable of uniformly heating an object to be heated in a short time.

【０００６】[0006]

【課題を解決するための手段】前記目的は、丸ビレット
を加熱するための加熱炉において、炉内を複数の燃焼ゾ
ーンに区画するとともに、燃料の燃焼と蓄熱体を通して
の排ガス排出を交番で行う１対以上の蓄熱式バーナを、
ビレット配置ピッチの１／２のピッチで炉壁に対向して
配置し、前記蓄熱式バーナにより燃料を不完全燃焼さ
せ、発生した火炎を隣り合う丸ビレット同士の中間位置
に存在させながら加熱することにより達成される。The object of the present invention is to provide a heating furnace for heating a round billet, in which the inside of the furnace is divided into a plurality of combustion zones, and the combustion of fuel and the discharge of exhaust gas through a regenerator are alternately performed. One or more regenerative burners
It is arranged opposite to the furnace wall at a pitch of 1/2 of the billet arrangement pitch, the fuel is incompletely burned by the regenerative burner, and the generated flame is present at an intermediate position between adjacent round billets. This is achieved by heating while heating.

【０００７】また、上記構成に加え、燃焼室の側壁また
は天井に配置した蓄熱式バーナとは別のバーナで、燃焼
排ガス中に酸素が残るような空燃比で燃料を燃焼させ、
前記燃焼排ガス中の酸素で、蓄熱式バーナの燃焼排ガス
中の未燃焼成分を燃焼させることにより、熱効率を高め
ることができる。[0007] In addition to the above configuration, the side wall of the combustion chamber or
Is a burner separate from the regenerative burner placed on the ceiling , burns fuel at an air-fuel ratio such that oxygen remains in the combustion exhaust gas,
By burning unburned components in the combustion exhaust gas of the regenerative burner with oxygen in the combustion exhaust gas, the thermal efficiency can be increased.

【０００８】同様に、燃焼室の側壁または天井に配置し
た空気供給ノズルから空気を供給して、蓄熱式バーナの
燃焼排ガス中の未燃焼成分を燃焼させることによって
も、熱効率を高めることができる。[0008] Similarly, it is arranged on the side wall or ceiling of the combustion chamber.
By supplying air from the air supply nozzle and burning unburned components in the combustion exhaust gas of the regenerative burner, the thermal efficiency can also be increased.

【０００９】[0009]

【作用】燃料を不完全燃焼させることにより、火炎は長
炎となり火炎温度は低くなる。よって、火炎を直接被加
熱物に当てるか又は被加熱物近傍に火炎を存在させて
も、そのことにより被加熱物の温度が上昇しすぎて溶け
たりすることがない。また、火炎は還元性であるので被
加熱物を酸化させることがない。火炎を直接被加熱物に
当てるか又は被加熱物近傍に火炎を存在させることによ
り、被加熱物の炉床側にも火炎からの輻射熱が伝わり、
被加熱物が均一に加熱される。さらには、蓄熱式バーナ
を、ビレット配置ピッチの１／２のピッチで炉壁に対向
して配置しているので、燃焼すると火炎が丸ビレットの
端面に当たる位置にある蓄熱式バ−ナは燃焼を停止し、
火炎が隣り合う丸ビレット同士の中間にある蓄熱式バ−
ナのみ燃焼させて加熱することができ、丸ビレット端面
の過加熱を防止することができる。 [Function] By incompletely burning fuel, the flame becomes a long flame and the flame temperature becomes low. Therefore, even if the flame is directly applied to the object to be heated or the flame is present in the vicinity of the object to be heated, the temperature of the object to be heated does not rise too much and melt. Further, since the flame is reducing, it does not oxidize the object to be heated. By irradiating the flame directly to the object to be heated or making the flame exist near the object to be heated, the radiant heat from the flame is also transmitted to the hearth side of the object to be heated,
The object to be heated is uniformly heated. Furthermore, regenerative burners
Facing the furnace wall at half the pitch of the billet arrangement pitch
So that when burning, the flame will be round billet
The regenerative burner located at the end face stops combustion,
A regenerative bar between the round billets where the flames are adjacent
Can be heated by burning only the round billet end face
Can be prevented from overheating.

【００１０】更に、本発明においてバーナに蓄熱式バー
ナが使用されているため、一対のバーナの燃焼が交互に
行われる。よって一定場所に火炎が連続して存在するこ
とがないので、被加熱材の一部のみが加熱されることが
防止されて均一加熱の効果がさらに著しくなる。Further, in the present invention, since a regenerative burner is used as the burner, combustion of the pair of burners is performed alternately. Therefore, since the flame does not continuously exist in a certain place, it is possible to prevent only a part of the material to be heated from being heated, and the effect of the uniform heating is further remarkable.

【００１１】これに加えて、過剰空気比率で燃焼させた
他のバーナの燃焼排ガス、又は空気供給ノズルより供給
した空気により、蓄熱式バーナの排ガス中の未燃焼成分
を燃焼させるようにすると、熱効率を高めることができ
る。In addition to this, if the unburned components in the exhaust gas of the regenerative burner are burned by the combustion exhaust gas of another burner burned at an excess air ratio or the air supplied from the air supply nozzle, the thermal efficiency becomes higher. Can be increased.

【００１２】[0012]

【実施例】本発明の加熱炉の加熱方法の第一の実施例を
丸ビレットを加熱する場合について、図１の説明図に基
づいて説明する。丸ビレットW は加熱炉１の炉床2 上に
載せられ炉内を順次搬送される。加熱炉１の両側壁に
は、燃焼開始および燃焼停止のタイミングを同一にする
蓄熱式バーナ群３ａ，３ｂ，３ｃおよび３ｄが配置され
ている。そして、バーナ群３ａで燃焼しているときはバ
ーナ群３ｃで排ガスを排出し、バーナ群３ｃで燃焼して
いるときはバーナ群３ａで排ガスを排出するというよう
に、バーナ群３ａとバーナ群３ｃを交番燃焼させる。ま
た、バーナ群３ｂとバーナ群３ｄも同じく交番燃焼させ
るようになっている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a heating method for a heating furnace according to the present invention will be described with reference to FIG. The round billet W is placed on the hearth 2 of the heating furnace 1 and is sequentially conveyed in the furnace. On both side walls of the heating furnace 1, groups of regenerative burners 3a, 3b, 3c and 3d for making the timing of starting and stopping the combustion the same are arranged. When burning in the burner group 3a, exhaust gas is discharged from the burner group 3c, and when burning in the burner group 3c, exhaust gas is discharged from the burner group 3a. Alternately burn. Further, the burner group 3b and the burner group 3d are also made to alternately burn.

【００１３】そして、丸ビレットW と各バーナの相対位
置を考慮しながら、３ａ，３ｃバーナ群、または、３
ｂ，３ｄバーナ群を燃焼させる。これは、ビレットW の
端面に燃焼火炎が衝突し端面過加熱を防止するためであ
る。バーナ配置のピッチは細かくすればするほど燃焼火
炎がビレットW とビレットW の間に配置でき端面過加熱
が防止できるが、ビレット配置ピッチの１／２とするの
が設備が大型化または複雑化せず適当である。図１で
は、バーナ群３ａ，３ｃの対で燃焼を行っており、燃焼
バーナ群は３ａで非燃焼バーナ群は３ｃである。In consideration of the relative position between the round billet W and each burner, a group of burners 3a, 3c or 3
b, Burn 3d burners. This is to prevent the combustion flame from colliding with the end face of the billet W to prevent overheating of the end face. The finer the pitch of the burner, the more the combustion flame can be placed between the billets W and the overheating of the end face can be prevented. However, setting the pitch to 1/2 of the billet arrangement makes the equipment larger or more complicated. It is appropriate. In FIG. 1, combustion is performed by a pair of burner groups 3a and 3c. The combustion burner group is 3a and the non-combustion burner group is 3c.

【００１４】本実施例では３０秒間隔で燃焼切り換えを
行い、３ａ，３ｃバーナ群、または、３ｂ，３ｄバーナ
群の燃焼切り替えは搬送速度で決まるが、平均で約１０
分で燃焼、非燃焼が切り替わる。燃焼火炎は不完全燃焼
火炎でビレットW が過酸化するのを防止している。ま
た、１次燃焼バーナ群３ａ，３ｂ，３ｃおよび３ｄの燃
焼順は対向するバーナでも斜め前に位置するバーナで
も、燃焼室で対角となるバーナなどいずれの組合せでも
よい。なお、図１で符号Ｆ1 は燃焼火炎（１次燃焼火
炎）である。In this embodiment, the combustion switching is performed at intervals of 30 seconds, and the combustion switching of the 3a and 3c burner groups or the 3b and 3d burner groups is determined by the transport speed.
It switches between combustion and non-combustion in minutes. The combustion flame prevents the billet W from being overoxidized by the incomplete combustion flame. The combustion order of the primary combustion burner groups 3a, 3b, 3c, and 3d may be any combination such as an opposed burner, a burner positioned diagonally forward, or a diagonal burner in the combustion chamber. Reference numeral F 1 in FIG. 1 is a combustion flame (primary combustion flame).

【００１５】次に、本発明の加熱炉の加熱方法の第二の
実施例を丸ビレットを加熱する場合について、図２の説
明図に基づいて説明する。この加熱方法の場合には、２
次燃焼バーナ群４ａ，４ｂ，４ｃ，４ｄにより燃料を空
気比１以上で燃焼させ、燃焼排ガス中の酸素で１次燃焼
バーナ群３ａ，３ｂ，３ｃおよび３ｄの燃焼で発生した
未燃成分（ＣＯ、Ｈ2等）を燃焼させて完全燃焼火炎を
形成する。これにより燃焼室内で燃焼室に投入した燃料
が完全燃焼しエネルギーの無駄が無い。図２で符号Ｆ2
は２次燃焼火炎である。Next, a second embodiment of a heating method for a heating furnace according to the present invention, in which a round billet is heated, will be described with reference to FIG. In the case of this heating method, 2
The fuel is burned at an air ratio of 1 or more by the secondary combustion burner groups 4a, 4b, 4c, and 4d, and unburned components (CO) generated by the combustion of the primary combustion burner groups 3a, 3b, 3c, and 3d with the oxygen in the combustion exhaust gas. , H2, etc.) to form a complete combustion flame. As a result, the fuel injected into the combustion chamber is completely burned in the combustion chamber, and there is no waste of energy. In Figure 2 reference numeral F 2
Is a secondary combustion flame.

【００１６】なお、２次燃焼バーナは燃焼室の側壁に設
置するサイドバーナ形式でも、天井に設置するルーフバ
ーナ形式でも、側壁、天井のどちらにも設置するバーナ
配置でもよい。また、２次燃焼バーナの燃焼順は対向す
るバーナでも斜め前に位置するバーナでも、燃焼室で対
角となるバーナなどいずれの組合せでもよい。The secondary combustion burner may be a side burner type installed on the side wall of the combustion chamber, a roof burner type installed on the ceiling, or a burner arrangement installed on both the side wall and the ceiling. The combustion order of the secondary combustion burners may be any combination such as an opposing burner, a burner positioned diagonally forward, or a diagonal burner in the combustion chamber.

【００１７】次に、本発明の加熱炉の加熱方法の第三の
実施例を丸ビレットを加熱する場合について、図３の説
明図に基づいて説明する。本実施例の場合、加熱炉１の
炉壁１ａに設けた空気供給ノズル群５ａ，５ｂ，５ｃお
よび５ｄから高温空気を炉内に供給し、１次燃焼バーナ
群３ａ，３ｂ，３ｃおよび３ｄの燃焼で発生した未燃成
分（ＣＯ、Ｈ2等）を燃焼させて完全燃焼火炎を形成す
る。これにより燃焼室内で燃焼室に投入した燃料が完全
燃焼しエネルギーの無駄が無い。なお、空気供給ノズル
群５ａ，５ｂ，５ｃおよび５ｄの設置箇所は側壁に限定
することはなく、天井に設けてもよい。Next, a third embodiment of the heating method of the heating furnace according to the present invention, in which a round billet is heated, will be described with reference to FIG. In the case of this embodiment, high-temperature air is supplied into the furnace from the air supply nozzle groups 5a, 5b, 5c and 5d provided on the furnace wall 1a of the heating furnace 1, and the primary combustion burner groups 3a, 3b, 3c and 3d are heated. The unburned components (CO, H2, etc.) generated by the combustion are burned to form a complete combustion flame. As a result, the fuel injected into the combustion chamber is completely burned in the combustion chamber, and there is no waste of energy. The installation locations of the air supply nozzle groups 5a, 5b, 5c and 5d are not limited to the side walls, but may be provided on the ceiling.

【００１８】[0018]

【発明の効果】以上の説明から明らかなように、本発明
は、上記のように構成させれているので、蓄熱式バーナ
の火炎を直接被加熱物に衝突させるか、被加熱物近傍に
火炎を存在させることにより被加熱物を均一に加熱する
ことが可能となり、しかも、被加熱物の表面酸化を防止
することが可能である。As is apparent from the above description, since the present invention is constructed as described above, the flame of the regenerative burner is caused to collide directly with the object to be heated or to be in the vicinity of the object to be heated. Makes it possible to uniformly heat the object to be heated, and to prevent surface oxidation of the object to be heated.

【００１９】さらに、蓄熱式バーナの不完全燃焼により
生じた未燃成分（ＣＯ、Ｈ2）をアフターバーニングし
燃焼室内で完全燃焼することによって、省エネルギーを
図ることができる。Further, energy saving can be achieved by afterburning unburned components (CO, H2) generated by incomplete combustion of the regenerative burner and completely burning them in the combustion chamber.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の加熱炉の加熱方法の第一の実施例の説
明図である。FIG. 1 is an explanatory view of a first embodiment of a heating method for a heating furnace according to the present invention.

【図２】本発明の加熱炉の加熱方法の第二の実施例の説
明図である。FIG. 2 is an explanatory view of a second embodiment of the heating method of the heating furnace according to the present invention.

【図３】本発明の加熱炉の加熱方法の第三の実施例の説
明図である。FIG. 3 is an explanatory view of a third embodiment of the heating method of the heating furnace according to the present invention.

【符号の説明】[Explanation of symbols]

１ 炉体 ２ 炉床 ３ａ〜３ｄ １次燃焼バーナ群 ４ａ〜４ｄ ２次燃焼バーナ群 ５ａ〜５ｄ 空気供給ノズル群 １１ 燃料ノズル １２ 空気ノズル Ｆ１ １次燃焼火炎 Ｆ２ ２次燃焼火炎 Ｗ 被加熱物 DESCRIPTION OF SYMBOLS 1 Furnace body 2 Hearth 3a-3d Primary combustion burner group 4a-4d Secondary combustion burner group 5a-5d Air supply nozzle group 11 Fuel nozzle 12 Air nozzle F1 Primary combustion flame F2 Secondary combustion flame W Heated object

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平７−97617（ＪＰ，Ａ) 特開 昭62−67111（ＪＰ，Ａ) 特開 平３−170614（ＪＰ，Ａ) 特開 平５−118764（ＪＰ，Ａ) 特公 平３−6966（ＪＰ，Ｂ２) 特公 昭63−60094（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 9/00 101 C21D 1/52 F27D 7/02 F27D 17/00 101 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-97617 (JP, A) JP-A-62-67111 (JP, A) JP-A-3-170614 (JP, A) JP-A-5-97614 118764 (JP, A) JP 3-6966 (JP, B2) JP 63-6,094 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) C21D 9/00 101 C21D 1/52 F27D 7/02 F27D 17/00 101

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 丸ビレットを加熱するための加熱炉にお
いて、炉内を複数の燃焼ゾーンに区画するとともに、燃
料の燃焼と蓄熱体を通しての排ガス排出を交番で行う１
対以上の蓄熱式バーナを、ビレット配置ピッチの１／２
のピッチで炉壁に対向して配置し、前記蓄熱式バーナに
より燃料を不完全燃焼させ、発生した火炎を隣り合う丸
ビレット同士の中間位置に存在させながら加熱すること
を特徴とする加熱炉の加熱方法。In a heating furnace for heating a round billet, the inside of the furnace is divided into a plurality of combustion zones, and combustion of fuel and discharge of exhaust gas through a regenerator are alternately performed.
Use more than one pair of regenerative burners at half the billet pitch
Circle of facing the furnace wall and arranged at a pitch, fuel is incompletely combusted by the regenerative burner, adjacent the generated flame
A heating method for a heating furnace, wherein heating is performed while the billet is present at an intermediate position between billets . 【請求項２】 燃焼室の側壁または天井に配置した蓄熱
式バーナとは別のバーナで、燃焼排ガス中に酸素が残る
ような空燃比で燃料を燃焼させ、前記燃焼排ガス中の酸
素で、蓄熱式バーナの燃焼排ガス中の未燃焼成分を燃焼
させることを特徴とする請求項１に記載の加熱炉の加熱
方法。2. A burner which is different from a regenerative burner disposed on a side wall or a ceiling of a combustion chamber and burns fuel at an air-fuel ratio such that oxygen remains in the flue gas. The method for heating a heating furnace according to claim 1, wherein unburned components in the combustion exhaust gas of the burner are burned. 【請求項３】 燃焼室の側壁または天井に配置した空気
供給ノズルから空気を供給して、蓄熱式バーナの燃焼排
ガス中の未燃焼成分を燃焼させることを特徴とする請求
項１に記載の加熱炉の加熱方法。3. The heating according to claim 1, wherein air is supplied from an air supply nozzle disposed on a side wall or a ceiling of the combustion chamber to burn unburned components in the combustion exhaust gas of the regenerative burner. Furnace heating method.
JP26444293A 1993-10-22 1993-10-22 Heating furnace heating method Expired - Fee Related JP3237345B2 (en)

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JP26444293A JP3237345B2 (en) 1993-10-22 1993-10-22 Heating furnace heating method

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Application Number Priority Date Filing Date Title
JP26444293A JP3237345B2 (en) 1993-10-22 1993-10-22 Heating furnace heating method

Publications (2)

Publication Number Publication Date
JPH07118753A JPH07118753A (en) 1995-05-09
JP3237345B2 true JP3237345B2 (en) 2001-12-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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JP (1) JP3237345B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014048020A (en) * 2012-09-04 2014-03-17 Chugai Ro Co Ltd Continuous type heating furnace

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JPH07118753A (en) 1995-05-09

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